Portable radio frequency modem adapter



FIG. 1 is a top front, and right side perspective view a portable radio frequency modem adapter showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear side elevational view thereof; and,

FIG. 4 is a bottom side elevational view thereof. 

The ornamental design for an portable radio frequency modem adapter, as shown and described. 